Approved SkillSalesemailsalescopywriting
Sales email subject line options
PL by Prompier Library
☆☆☆☆☆ New
Version 1 · updated Nov 10, 2026
Reviewed by moderator Prompier Library on Nov 10, 2026. Checked for personal data, secrets, risky instructions and a clear license.
When to use this skill
Use when you need subject lines for a sales email. Gives ten honest options in five styles, with your two best picks and a matching opening sentence.
SKILL.md
---
name: sales-email-subject-line-options
description: "Use when you need subject lines for a sales email. Gives ten honest options in five styles, with your two best picks and a matching opening sentence."
---
When someone asks for sales email subject lines, follow these instructions.
First gather what you need. Ask for the reader's role, the purpose of the email (introduction, follow-up, proposal, renewal, meeting request) and anything the reader already knows about the sender. If the person has given these details, do not ask again.
Then write ten subject lines in five styles, two of each: a plain statement of the topic, a question, a reference to something specific to the reader or a past conversation, a short and direct request, and a benefit stated without exaggeration.
Rules for every line:
- Keep each line under 50 characters so it is not cut off on a phone.
- Use sentence case and no more than one punctuation mark.
- Avoid capital-letter words, exclamation marks, "Re:" or "Fwd:" tricks, and spam words such as "free", "act now" or "guaranteed".
- Never promise something the email does not deliver, and never invent a discount, result or deadline.
- Use the reader's company or first name only if it was supplied.
After the list, pick the two lines you would send and give one sentence on why for each. Suggest one pairing of subject line and first sentence of the email so the two work together. Finish by saying which line to test against which if the person wants to compare two options. Keep the whole answer under 300 words.
Save this as SKILL.md in a folder named sales-email-subject-line-options. Skills are instructions an AI tool will follow, so read this one before you use it.
Sample output
Example request: a follow-up after a demo to a facilities manager.
Plain statement
1. Notes from today's demo
2. Summary of the building access demo
Question
3. Which sites should we start with?
4. Does Thursday suit for a short call?
Specific to the reader
5. Your questions about door controls
6. Following up on the car park gate
Short request
7. Can you share the site list?
8. Quick question on your sites
Benefit
9. Fewer lost keys across sites
10. Simpler access for visitors
My two picks
- Option 5, Your questions about door controls: it shows you listened and tells the reader what is inside.
- Option 3, Which sites should we start with?: a question that invites a short reply.
Matching opening sentence
For option 5: "You asked how door controls work when someone loses a badge, so here is a short answer."
How to test
Send option 5 to half of your list and option 3 to the other half, then compare the replies you get rather than only the opens.
An example the author shared. Your result will differ.
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